If you are at all successful in your business, be prepared to never have another good day or bad day at work. There will be so many things - good and bad - happening on any given day that you will be on a roller coaster of highs and lows. If that excites you, then go for it.

I've always learned on-the-job, in real time. A problem comes up; I research it, and try to solve it. You can't study to be an entrepreneur; you have to develop those skills day in day out. All entrepreneurial experiences are related, whether you're selling worm poop to Wal-Mart or a grade tracking application to the public elementary school system. In the end, it's all very similar.

In looking at waste as an entirely modern, man-made idea, I stopped viewing garbage as garbage and instead slowly started to see it as a commodity.

Entrepreneurs don't really make mistakes, though. We just make decisions that seem right at the time, but which sometimes turn out to have been the wrong path to take. For example, we allowed a buyer to place a huge opening order and later had to take some product back. We didn't have our sell-through programs in place, so in hindsight, it would have been wiser to sell in less product at the outset. The scary thing is you are always making decisions without knowing the future.

If you are at all successful in your business, be prepared to never have another good day or bad day at work. There will be so many things - good and bad - happening on any given day that you will be on a roller coaster of highs and lows. If that excites you, then go for it.